Medical stapler and medical system
A medical stapler includes a grasping portion connected to an endoscope and having a first jaw and a second jaw connected by a rotation shaft; an operation portion configured to receive an external force for operating the grasping portion to open and close; a first wire configured to transmit the external force that is received by the operation portion to the grasping portion; and a movable pin attached to a distal end of the first wire, wherein the grasping portion is transitioned to an open state and a closed state by the first/second jaw relatively rotating with each other, and the movable pin is advanceable and retractable between positions at the proximal-end and distal-end side of the rotation shaft in a state in which the movable pin is engaged with an engagement groove formed in the first jaw.
1 . A medical stapler, comprising:
a cap configured to attach to an endoscope;
a grasping portion connected to the cap and having a first jaw and a second jaw connected by a rotation shaft;
an operation portion configured to receive an external force for operating the grasping portion to open and close;
a first wire including a proximal end connected with the operation portion and a distal end connected with the grasping portion; and
a movable pin attached to the distal end of the first wire, wherein:
the grasping portion is transitioned to an open state and a closed state by the first jaw and the second jaw relatively rotating around the rotation shaft;
the rotation shaft is positioned more distally than a distal end of the cap; and
the movable pin is advanceable and retractable between a position proximal relative to the rotation shaft and a position distal relative to the rotation shaft in a longitudinal direction of the first jaw in a state in which the movable pin is engaged with an engagement groove formed in the first jaw.
2 . The medical stapler according to claim 1 , wherein the first jaw and the second jaw are opposite to each other when the grasping portion is in the closed state, and wherein when the grasping portion is in the open state, the first jaw and the second jaw are arranged at 90 degrees to each other.
3 . The medical stapler according to claim 1 , wherein the first jaw includes a staple extraction portion, wherein the second jaw includes a staple reception portion, and wherein the second jaw rotates with respect to the first jaw around the rotation shaft.
4 . The medical stapler according to claim 1 , wherein the endoscope includes an objective lens provided in a distal-end portion for observing a treatment target, and wherein a first distance between a central axis of the endoscope and the rotation shaft is equal to or larger than a second distance between the central axis of the endoscope and a center of the objective lens.
5 . The medical stapler according to claim 1 , wherein the endoscope includes a treatment channel formed to extend from a distal end to a proximal end thereof for inserting an endoscopic treatment device through the endoscope, wherein the treatment channel includes an opening at a distal-end portion of the endoscope, and wherein a first distance between a central axis of the endoscope and the rotation shaft is equal to or larger than a radius of a circle with the central axis of the endoscope as a center that circumscribes the opening.
6 . The medical stapler according to claim 1 , wherein when the grasping portion is in the open state, the second jaw is positioned between the rotation shaft and the endoscope in the longitudinal direction of the first jaw.
7 . The medical stapler according to claim 1 , wherein a first region in which the first wire is advanceable and retractable by use of the operation portion is arranged at an outside portion of the rotation shaft in a radial direction of the cap.
8 . The medical stapler according to claim 7 , further comprising:
a second wire configured to transmit an external force to a staple extraction portion provided in the first jaw so as to extract a staple, wherein a second region in which the second wire is advanceable and retractable by use of the operation portion is arranged at an inside portion of the first region in the radial direction of the cap.
9 . The medical stapler according to claim 1 , wherein when the grasping portion is in the closed state, a gap having a predetermined distance is formed between a distal-end portion of the first jaw and a distal-end portion of the second jaw.
10 . The medical stapler according to claim 1 , wherein the first jaw includes a staple extraction portion, wherein the second jaw includes a staple reception portion, wherein the second jaw is provided with a concave portion formed in at least part of a region in a direction from the staple reception portion to the rotation shaft, and wherein a distance between the first jaw to the concave portion is larger than a distance from the first jaw to other part of the second jaw.
11 . A medical system, comprising:
an endoscope having flexibility; and
a medical stapler engaged with the endoscope, wherein the medical stapler comprises:
a cap configured to attach to the endoscope;
a grasping portion connected to the cap, the grasping portion having a first jaw and a second jaw connected by a rotation shaft;
an operation portion configured to receive an external force for operating the grasping portion to open and close;
a first wire including a proximal end connected with the operation portion and a distal end connected with the grasping portion; and
a movable pin attached to the distal end of the first wire, wherein;
the grasping portion is transitioned to an open state and a closed state by the first jaw and the second jaw relatively rotating around the rotation shaft;
the rotation shaft is positioned more distally a distal end of the cap; and
the movable pin is advanceable and retractable between a position at a proximal-end side of the rotation shaft and a position at a distal-end side of the rotation shaft in a longitudinal direction of the first jaw in a state in which the movable pin is engaged with an engagement groove formed in the first jaw.
12 . The medical system according to claim 11 , wherein the first jaw and the second jaw are opposite to each other when the grasping portion is in the closed state, and wherein when the grasping portion is in the open state, the first jaw and the second jaw are arranged at substantially 90 degrees to each other.
13 . The medical system according to claim 11 , wherein the first jaw includes a staple extraction portion, wherein the second jaw includes a staple reception portion, and wherein the second jaw rotates with respect to the first jaw around the rotation shaft.
14 . The medical system according to claim 11 , wherein the endoscope includes an objective lens provided in a distal-end portion for observing a treatment target, and wherein a first distance between a central axis of the endoscope and the rotation shaft is equal to or larger than a second distance between the central axis of the endoscope and a center of the objective lens.
15 . The medical system according to claim 11 , wherein the endoscope includes a treatment channel formed to extend from a distal end to a proximal end thereof for inserting an endoscopic treatment device through the endoscope, wherein the treatment channel includes an opening at a distal-end portion of the endoscope, and wherein a first distance between a central axis of the endoscope and the rotation shaft is equal to or larger than a radius of a circle with the central axis of the endoscope as a center that circumscribes the opening.
16 . The medical system according to claim 11 , wherein when the grasping portion is in the open state, the second jaw is positioned between the rotation shaft and the endoscope in the longitudinal direction of the first jaw.
17 . The medical system according to claim 11 , wherein a first region in which the first wire is advanceable and retractable along the longitudinal direction is arranged at an outside portion of the rotation shaft in a radial direction of the cap.
18 . The medical system according to claim 17 , wherein the medical stapler further comprises:
a second wire configured to transmit an external force to a staple extraction portion provided in the first jaw so as to extract a staple; and
a second region in which the second wire is advanceable and retractable along the longitudinal direction is arranged at an inside portion of the first region in the radial direction of the cap.
19 . The medical system according to claim 11 , wherein when the grasping portion is in the closed state, a gap having a predetermined distance is formed between a distal-end portion of the first jaw and a distal-end portion of the second jaw.
20 . The medical system according to claim 11 , wherein the first jaw includes a staple extraction portion wherein the second jaw includes a staple reception portion, wherein the second jaw is provided with a concave portion formed in at least part of a region in a direction from the staple reception portion to the rotation shaft, and wherein a distance between the first jaw to the concave portion is larger than a distance from the first jaw to other part of the second jaw.